There is also Abiss, Matriarchy, Silvery K. Something Spunky, Stockholm&Lima,Tia, Xplicit, and Z&A.
Abiss has a Decadence sofa with D/s.
Matriarchy has a variety of furniture and devices for Femdom.
Silvery K has an ornate throne chair/footrest.
Something Spunky has Mistress thrones, and Mistress Grooming Stool (great for spa or bathroom area)
Stockholm&Lima has a variety of D/s furniture (very good).
Tia has a Kaoutar Lounge (D/s sofa).
Xplicit has a decent throne chair as well
Z&A has a variety of things and a thone chair